LD33CV datasheet(1/44 Pages) STMICROELECTRONICS

Part #	LD33CV

Description	Adjustable and fixed low drop positive voltage regulator

PDF	44 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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This is information on a product in full production.

November 2013

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LD1117

Adjustable and fixed low drop positive voltage regulator

Datasheet

- production data

Features

• Low dropout voltage (1 V typ.)

• 2.85 V device performances are suitable for

SCSI-2 active termination

• Output current up to 800 mA

• Fixed output voltage of: 1.2 V, 1.8 V, 2.5 V,

3.3 V, 5.0 V

• Adjustable version availability (VREF = 1.25 V)

• Internal current and thermal limit

• Available in ± 1 % (at 25 °C) and 2 % in full

temperature range

• Supply voltage rejection: 75 dB (typ.)

Description

The LD1117 is a low drop voltage regulator able

to provide up to 800 mA of output current,

available even in adjustable version (VREF =

1.25 V). Concerning fixed versions, are offered

the following output voltages: 1.2 V, 1.8 V, 2.5 V,

2.85 V, 3.3 V and 5.0 V. The device is supplied in:

SOT-223, DPAK, SO-8 and TO-220. The SOT-

223 and DPAK surface mount packages optimize

the thermal characteristics even offering a

relevant space saving effect. High efficiency is

assured by NPN pass transistor. In fact in this

case, unlike than PNP one, the quiescent current

flows mostly into the load. Only a very common

10 µF minimum capacitor is needed for stability.

On chip trimming allows the regulator to reach a

very tight output voltage tolerance, within ± 1 % at

25 °C. The adjustable LD1117 is pin to pin

compatible with the other standard. Adjustable

voltage regulators maintaining the better

performances in terms of drop and tolerance.

TO-220

DPAK

SOT-223

SO-8

www.st.com

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